user avatar
user avatar
user avatar
Calmarius
  • Member for 10 years, 6 months
  • Last seen more than a week ago
  • Mezőkövesd, Hungary
110 votes
7 answers
20k views

Is it possible to start fire using moonlight?

47 votes
6 answers
27k views

Do people wearing glasses have different field of view than those who don't?

45 votes
6 answers
70k views

Why is electric field strong at sharp edges?

32 votes
4 answers
6k views

Is it possible to focus the radiation from a black body to make something hotter than that black body?

27 votes
3 answers
14k views

Intuitive understanding of the elements in the stress-energy tensor

22 votes
4 answers
4k views

Does relativistic mass have weight?

20 votes
1 answer
1k views

Do gravitational many-body systems fall apart eventually?

19 votes
2 answers
2k views

How far can we separate two bound quarks?

17 votes
5 answers
4k views

Are gravitational time dilation and the time dilation in special relativity independent?

17 votes
4 answers
2k views

Is simultaneity well-defined in general relativity?

15 votes
2 answers
2k views

Do particles behave like electromagnetic waves?

13 votes
3 answers
3k views

Is time going backwards beyond the event horizon of a black hole?

12 votes
2 answers
3k views

Is a black hole singularity a single point?

12 votes
1 answer
3k views

What is a quantum field?

12 votes
4 answers
3k views

How do we know that the cosmic background radiation comes from the early universe?

11 votes
4 answers
2k views

Has relativity of simultaneity been directly observed?

11 votes
5 answers
11k views

What's the idea behind the Riemann curvature tensor?

10 votes
4 answers
11k views

Why proper acceleration is $du/dt$ and not $du/d\tau$?

10 votes
3 answers
3k views

How does a rotating object cause frame dragging?

10 votes
2 answers
1k views

How to add together non-parallel rapidities?

10 votes
3 answers
2k views

What is the experimental evidence that suggests space-time is curved?

9 votes
1 answer
8k views

What's the relationship between glow and arc discharge?

8 votes
1 answer
10k views

Why do I hear a deep rumble when I cover my ears?

8 votes
2 answers
677 views

Do bosons and fermions produce the same interference pattern in a double slit experiment?

7 votes
1 answer
193 views

Where does the momentum of light go during total internal reflection?

7 votes
2 answers
8k views

What's the efficiency of real heat engines?

7 votes
1 answer
277 views

What does Ricci tensor do with two vectors?

6 votes
2 answers
489 views

Does electromagnetic field collapse the wave function of charged particles?

6 votes
1 answer
3k views

How often does a cosmic ray hit our eyes when we are on Earth?

5 votes
1 answer
270 views

What would a length contracted object look like?